Guinsoo's used to turn them into sheep but at the request of New Zealand players it was changed due to the complete mental barrier that ensured and their inability to play the game after the item was used

I'm quite fond of my own Bnet clan, Clan Cola:
Can of Liquid Awesome
It just fits so well. And I love cola. :P
When I made it, I checked; EPIC was also available (no longer though).

I haven't seen many funny names, but I like the concept of Celebrity Allstars alot. The clan (I think) on Northrend, not the one that participated in leagues.

Finally, for our participation in a small league, me and my friends used Zerg with Boobs as a makeshift name since we couldn't come up with something better at the time.
Every other team was jealous of our name :P